Solid OpenGL lights in Blend4Web?
You can obtain this effect by parenting several point lights to the camera and don't foget do disable shadows.

You can set up a camera in one view and point it to the standart cube, also add one by one three lights. Then swithing between default solid shading and GLSL shading move the lights in that way so the shading of the cube model in GLSL model started to look like the default OpenGL light in solid mode. Only your eyes and feelings can help you to obtain waht you need. The right colors of the light you can copy from blender preferences in System tab.